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Picture of How to fix Samsung LN46C630 screen flickering issue
The Samsung LN46C630 TV has a known issue with screen flickering after the warranty has expired.  Rather than pay $150 at your local repair show, fix it yourself in 15 minutes!

The fix for this issue is easy.  There is a jumper on the power supply named JP852.  If you cut that jumper, the screen flicker will no longer happen.  I do not know what JP852 is used for, but apparently there is a service bulletin from Samsung for this fix.  Thank you to Denise from an Amazon.com review (here) who provided the details on this fix.

Please assume this will void your warranty and potentially break your TV.  After doing this fix on my own, my TV has been running fine since February 18, 2012 .  I will update this guide if for some reason my TV stops working.

UPDATE June 14, 2012: It has been a few months and my TV still works great!
UPDATE December 31, 2012: My TV is still going strong.  NO ISSUES TO REPORT!
UPDATE March 16, 2013: All is well!  It has been over 12 months since I cut the jumper and everything still works as well as the day I bought it.
UPDATE June 19, 2013:  Still going strong.  NO ISSUES TO REPORT!

Step 1: Symptoms

The symptoms of this issue are mostly described as "screen flickering".  It mostly happens intermittently at first, then gets progressively worse.  HDMI connections start first, then component, etc.  If the user turns the TV off, then on, it usually fixes the issue for a little while, but it eventually comes back.  After a month or two, the screen will flicker be permanent.

The model fixed in this tutorial is a LN46C630K1F.  This fix is supposed to work for all TVs in this class.  I did see something online about this issue happening on other Samsung TVs in a different class and the fix was cutting a different jumper.

Step 2: Remove the back cover of the TV

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There are 18 screws (there is a harder to find screw in between the two rows of component jacks).  A normal sized Phillips head works.  If you are leaving this TV on the stand base, remove the bottom two screws last and be careful, it just sitting on that base without any screws!  I recommend replacing the bottom two screws after you have the back cover off so you TV does not fall off the base.

Step 3: Find the power supply

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The power supply is located where...  the power cord plugs in!

Step 4: Find jumper JP852

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Jumper JP852 is located on the power supply in the top left corner just below the 46.  It connects something labelled 'Input rating' and another labeled 'COLD'

Step 5: Cut jumper JP852

Picture of Cut jumper JP852
This is easy and you can probably just use scissors.  Cut the jumper on the middle and separate the wire so it doesn't touch.  Put the case back on the TV and you're done!
 
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BrandonL174 days ago

I just did this to my tv...went from flickering so bad that you could not use it. it works perfect now!!! thank you thank you thank you!

DustinW610 days ago
What jumper do i cut to stop flickering screen? I do not have jp 852 jumper.
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JaiS22 months ago

Hey Guys! I suddenly faced Screen blinking issue in my Samsung 32F5100 TV which is just above 1 year old(Out of Warranty).

I Cudn find the JP 5854/JP 852 Jumper. It starts from JP 801 to JP 829 and some other series of Jumpers.

I called up the Service gut from Samsung and he has given a repair Estimate that would cost a new TV :(

It would be really great if someone can let me know how to fix this issue for my model

Samsung F5100.

Many Thanks!!!!

DustinW6 JaiS210 days ago
Did anyone give you an answer too this problem? If so can you pls let me know what jumper will work?
HabMoh25 days ago
Which one I need to cut to fix the flicker problem on the screen
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HabMoh25 days ago
I haven't seen anyone have answered for 40 inch TVs. I have LN40D630 but didn't find the exact jumper number from this forum. Note sure cutting the jump would really work.
CiconneR1 month ago

mine is LN40C630 but the power supply is different which is my jp852

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I have the same. An LN40C630 also. Can't find anything labeled JP. Lots of JW's but no JP's. Any idea on what the 40" equivalent of the JP852 is?
caper7ca2 months ago
Gotta love the Internet!

So exact same TV and started flickering a few months ago. First thought it was the DVD player but then started happening on every source (Rogers cable box, Apple TV and DVD player). Usually changing channel on cable would work or powering off and on but as posted here, it got worse and today nothing would fix it.

Took back cover off as described and found jumper and cut it! So far - so good. All works and so far no flickering.

Only issue I had was that the cover didn't go on correctly on the top of the set so I undid the two screws and reseated it with no problem.

I laid the TV face down on the coffee table with a blanket just to be safe.

Will you an update in a while.

Thanks!
ElSkillz2 months ago

Update: Not that nothing displays; its actually the backlight that doesn't turn on

ElSkillz2 months ago

I just observed that when I cut the two jumpers the TV still does turn on cause I have Audio, only problem is nothing displays.

Any help on this matter will be sternly appreciated.

ElSkillz2 months ago

Hello, I have a samsung tv 32" with Model Code: LA32D403E2XSW

I tried following the steps above but encountered a snag; mine had no JP852 jumper and it wasn't just one jumper located at the input section, mine had two jumpers labelled JP817 and JP804, so I proceeded to cut the two instead but then mine TV would only blink the red LED light in front of it - showing its about to turn on - but after that nothing happens. I reconnected each jumper cable separately but each time the same annoying flickering screen is what greets me 'good morning'.

Any suggestions as to what I'd try???

Hello, I have a un55D8000 that started flickering yesterday. I followed the instructions to cut jp852. Now the tv doesnt come on at all. I soldered jp852 back together and still nothing. Any insight would be GREATLY APPRECIATED!
KeriJ2 months ago

I have the ln40a550 model, and there isn't a 852 or 854 cable on my board. Anyone know which one I need to cut?

Rockstar08863 months ago
I have a Samsung 55" led 3d TV model 8000. Will this fix work on it? The screen is flickering. Not going out or fading or motion freezing, but the brightness is flickering like a strobe light, hurting my eyes to watch. Seems like after it warms up a little while.
keramirez044 months ago
I have a 55 inch would this work for mine !!!!
William J.A6 months ago

My Samsung 46" television starting flickering or "strobing" about a month ago and had slowly gotten worse. After searching the internet I discovered the fix by cutting the jp852 jumper described in the Samsung service bulletin. I wasn't sure the TV would actually fire back up after cutting the jumper so I shopped around and decided what tv I would buy & where I would buy just in case the procedure didn't work. It took about 30 minutes to disassemble the TV, locate the jumper, snip it and reassemble. Guess what! It was an easy fix, the TV fired back up, it's been 2 weeks & it hasn't flashed once. Thanx, EANDA36.

yb19867 months ago

I have a Samsung UE46C8000 (xw) and had very awful blinking problem. Blinking was stronger with bright pictures. It went worse and worse by time...

In my condition, first i cut J852 and my tv didn't start. Than i soldered it and cut J970. Working perfectly about 4 days without blink. I've tested all tv fonctions too (e.g. usb ports, hdmi ports, speakers, optic audio ports etc...). There is no problem now.

I think, people having blinking problem should be looking for "input" section at power supply card. It's in a rectangle area. There is only one jumper near "input". Cut it...

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DarrylP18 months ago

Worked on my 46" C610 (same board/jumper). Wonder how many Samsung tv's have ended up in the landfill when there is such a simple solution. One thing concerns me though. Could the flickering be caused due to something overheating? Is this fix creating a potential fire hazard if that is the case? The wire had to serve some purpose didn't it? Not especially worried, if something was going to happen it would happen sooner than later I would think. I'll just make sure its off if i'm not home. Thanks for saving me the cost of a new tv.

MustafaA78 months ago

Hallo ich habe das Modell LE46C530F1W und hat bei mir auch prima geklappt.

Vielen Dank an diejenigen die sich die die mühe gemacht haben und uns somit geholfen haben.

Hi-TechS8 months ago

i did it and everything is good, but in HDMI the screen is showing good, then the screen goes black and make the same!

PaulD128 months ago

Thanks for the tip, works well on my TV, I did it last night, I was a kind of skeptical, but I did it, and the results was phenomenal, great tip. Thanks Again.

Homestead, FL.

MiteshG18 months ago

hi

i have samsung ua32eh6030 model and after finish 13 month of purchase its start flashing , can its have same psu board like you show in image, after very hard work serching solutions online only one here i ll get solution from you thats my hope

amdani79 months ago

i have model UN55F6350

pbedard29 months ago

that work with my ln46c610 nice thx for the fix

abbiet9 months ago

Wow, I didn't believe it would work, but it sure did! I can't thank you enough as you've just saved me a bundle. My husband was ready to buy a new TV. I was on the phone with Samsung's tech people and they said it was my cable box. Thank you again, Chabs15

mike.amstadt9 months ago

I did this 6 months ago and it works fine ... no more flickering !!!!

Did ur tv turn black and sound was still on ? My tv does flicker.
Did ur tv turn black and sound was still on ? My tv does flicker.
NukaCola10 months ago

I have this exact model with vertical rainbow lines showing up intermittently at the televisions start. Does cutting the jumper solve that issue as well?

i have a Samsung UA37D5000 model and it has a flickering issue
i tried opening the panel and i cant find the JP852 jumper... do you have an alternative fix for this particular model? has anyone encountered the same flickering issue with the same model? - thanks!

SabyN10 months ago

i have the LN46A550P3FXZC MODEL flickering wich wire i need to cut ?

woolhiser10 months ago

I have this same model and I've had the tv 5 years and now it strobes all the time. I have a friend coming over tonight with a screwdriver and we're going to try this. I'll let you know how it goes.

We did it, it works great now thank you for this fix!!! I was trying to save up money for a new tv and now I don't have to.

my samsung is acting up ,,the screen will go black for a 2 second pause. And this occurs at varying increments of time. Sort of like the blank screen you get when turning Chanel's but the channels are not being turned,,,,any one else having these symptoms with any remedy?

Hi,

Are you aware of the same problem for the un46d600 serie? The symptoms seams to be the same.

Or can you show me where i can look for the repair solution.

Thank you very much

I am also having the same issue with the un46d600. Just started last night, way out of time on the warranty. I am tempted to open it up and see it looks the same but I don't want to cut any cables without knowing if they use the same fix. Any luck finding out?

naineshs11 months ago

Hi, I have a similar 40" model LN40530. Anybody who was able to fix it or another solution?

Thanks.

I am having the same problem with my television LN40B500P3F but I don't see the wire wire labels jp852 on my 40". Does anyone know of any other wires that could solve the problem for my model?

Hi, I have a similar 40" model. Were you able to find the jumper or another fix?

Thanks.

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